Food in France perhaps a mother's cooked, full of energy (9)
I believe the answer is:
horsemeat
'food in france' is the definition.
(meat eaten in France)
'a mother's cooked full of energy' is the wordplay.
'cooked' indicates an anagram.
'full of' means one lot of letters goes inside another.
'energy' becomes 'e' (physics symbol as in E=mc2).
'a'+'mothers'='amothers'
'amothers' is an anagram of 'horsemat'.
'horsemat' enclosing 'e' is 'HORSEMEAT'.
'perhaps' is the link.
(Other definitions for horsemeat that I've seen before include "food fit for dogs" , "It's not served in most restaurants!" , "source of food adulteration?" .)